Inductive sensor
By designing an inductive sensor and adopting the principle of non-contact inductive magnetic coupling, the problems of high cost, susceptibility to external interference and wear of traditional contact sensors are solved, and low-cost, long-life and high-precision measurement are achieved, which is suitable for a variety of vehicles and equipment.
Patent Information
- Application Number
- CN202423063435.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-12-12
AI Technical Summary
Traditional contact sensors are expensive, susceptible to external interference, easy to wear, and have high measurement costs, especially their poor fixture applicability.
An inductive sensor with a non-contact structure was designed, including a base, a cover, a sub-rotor, a main rotor, a PCBA board and a connector. The inductive magnetic coupling principle was used to sense position changes through the meshing of the main and sub-rotors with the coil, thus achieving non-contact measurement.
It reduces costs, extends service life, improves measurement accuracy and compatibility, and is suitable for various types of vehicles and equipment.
Smart Images
Figure CN223412671U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical fields of sensors and the like, and in particular to an inductive sensor. Background Art
[0002] At present, traditional contact sensors have the following problems: high cost; susceptibility to external interference: Since the contact sensor is in direct contact with the object being measured, its measurement results may be affected by external interference, affecting the measurement accuracy; easy to wear: During long-term use, the contact head of the contact sensor is prone to wear, which affects the measurement accuracy; high measurement cost: In order to determine the measurement reference point, special fixtures may be required, which will lead to higher measurement costs, especially for products of different shapes, the applicability of the fixture will be reduced, thereby increasing costs. Utility Model Content
[0003] In view of this, in order to solve the above problems, the purpose of the present invention is to provide an inductive sensor, which includes:
[0004] Base, cover, auxiliary rotor, main rotor, PCBA board, connector;
[0005] The PCBA board is installed on the cover plate;
[0006] The connector is mounted on the PCBA board;
[0007] The auxiliary rotor is installed inside the base;
[0008] The main rotor is mounted on the cover plate, and the upper end of the main rotor passes through the PCBA board and engages with the auxiliary rotor;
[0009] The cover plate is mounted on the base.
[0010] The above-mentioned inductive sensor further includes: a bracket; the auxiliary rotor is installed inside the base through the bracket.
[0011] In the above-mentioned inductive sensor, a circular through hole is provided on the PCBA board, and the main rotor extends into the interior of the base through the circular through hole and engages with the auxiliary rotor.
[0012] In the above-mentioned inductive sensor, two groups of main receiving coils are provided on the PCBA board, and each group of the main receiving coils is surrounded by a circle of the first excitation coil.
[0013] In the above-mentioned inductive sensor, the two groups of main receiving coils are symmetrically arranged on both sides of the circular through hole with respect to the center of the circular through hole.
[0014] In the above-mentioned inductive sensor, the PCBA board is provided with a secondary receiving coil at a position close to the secondary rotor, and the peripheral portion of the secondary receiving coil is covered with a circle of the second excitation coil.
[0015] In the above-mentioned inductive sensor, the meshing portion of the main rotor is an annular iron sheet with teeth on the outer wall.
[0016] In the above-mentioned inductive sensor, the meshing portion of the auxiliary rotor is composed of a plurality of semicircular iron sheets.
[0017] Compared with the prior art, the above technical solution has the following positive effects:
[0018] Through the application of the utility model, an inductive sensor is provided. The device adopts a non-contact sensor, does not require a clamp, and has a smaller structure volume; does not require a magnet, which reduces the cost; has a long service life and reduces maintenance costs; has good compatibility and scalability, and can be applied to various types of vehicles and equipment to meet the needs of different industries and scenarios. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of an inductive sensor of the present invention.
[0020] Figure 2 This is a schematic diagram of the PCBA board in the present invention.
[0021] Figure 3 It is a partial schematic diagram of the main rotor and auxiliary rotor in the utility model.
[0022] Figure 4 This is a working principle diagram of an inductive sensor in the present utility model.
[0023] 1. Base; 2. Auxiliary rotor; 3. Main rotor; 4. PCBA board; 5. Cover; 6. Connector; 7. Bracket; 8. Main receiving coil; 9. First excitation coil; 10. Auxiliary receiving coil; 11. Second excitation coil; 12. Circular through hole; 13. Ring iron sheet; 14. Semicircular iron sheet. DETAILED DESCRIPTION
[0024] The present invention will be further described below with reference to the accompanying drawings and specific implementations, but they are not intended to limit the present invention.
[0025] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by those familiar with this technology. They are not used to limit the conditions for implementation of the present invention and therefore have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose of the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be considered as the scope of implementation of the present invention without substantially changing the technical content.
[0026] like Figures 1 to 4 As shown, an inductive sensor of a preferred embodiment is shown, which includes: a base 1, a cover plate 5, a secondary rotor 2, a main rotor 3, a PCBA board 4, and a connector 6.
[0027] The PCBA board 4 is mounted on the cover plate 5; the connector 6 is mounted on the PCBA board 4; the auxiliary rotor 2 is mounted inside the base 1; the main rotor 3 is mounted on the cover plate 5, and the upper end of the main rotor 3 passes through the PCBA board 4 and engages with the auxiliary rotor 2; the cover plate 5 is mounted on the base 1.
[0028] During actual use, the auxiliary rotor 2 is clamped inside the bracket 7 and installed in the base 1. Then the main rotor 3 is installed in the base 1 so that the main rotor 3 and the auxiliary rotor 2 are engaged. Then the connector 6 is installed on the PCBA board 4, and the PCBA board 4 is installed in the base 1. Finally, the cover plate 5 covers the PCBA board 4, and the base 1 and the cover plate 5 are fixed by laser welding.
[0029] The present invention also has the following implementation methods based on the above:
[0030] Furthermore, an inductive sensor further includes: a bracket 7; the auxiliary rotor 2 is installed inside the base 1 through the bracket 7.
[0031] Furthermore, an inductive sensor is provided, wherein a circular through hole 12 is provided on the PCBA board 4 , and the main rotor 3 extends into the interior of the base 1 through the circular through hole 12 and engages with the auxiliary rotor 2 .
[0032] Furthermore, an inductive sensor is provided, wherein two groups of main receiving coils 8 are provided on the PCBA board 4 , and the periphery of each group of main receiving coils 8 is covered with a circle of first excitation coil 9 .
[0033] Furthermore, an inductive sensor is provided, wherein two groups of main receiving coils 8 are symmetrically arranged on both sides of the circular through hole 12 with respect to the center of the circular through hole 12 .
[0034] Furthermore, an inductive sensor is provided, wherein the PCBA board 4 is provided with an auxiliary receiving coil 10 at a position close to the auxiliary rotor 2 , and the outer periphery of the auxiliary receiving coil 10 is covered with a circle of second excitation coil 11 .
[0035] Furthermore, an inductive sensor is provided, wherein the meshing portion of the main rotor 3 is an annular iron sheet 13 with teeth on the outer wall.
[0036] Furthermore, an inductive sensor is provided, wherein the meshing portion of the auxiliary rotor 2 is composed of a plurality of semicircular iron sheets 14 .
[0037] This device also has the following operating principle: The inductive sensor is an inductive magnetically coupled, non-contact angle sensor. It consists of a first excitation coil 9, a second excitation coil 11, a main receiving coil 8, a secondary receiving coil 10, the main rotor 3, the secondary rotor 2, and a processing circuit. The sensing portion comprises the first excitation coil 9, the second excitation coil 11, the main receiving coil 8, and the secondary receiving coil 10. The first excitation coil 9 and the second excitation coil 11 generate a varying electromagnetic field, and the main receiving coil 8 and the secondary receiving coil 10 sense the positions of the main rotor 3 and the secondary rotor 2 within this electromagnetic field. The main rotor 3 and the secondary rotor 2 are made of conductive material, generating eddy currents in the varying electromagnetic field, which affect the electromagnetic field in the coverage area. The main receiving coil 8 and the secondary receiving coil 10 are typically printed on a printed circuit board in the form of copper traces. They convert changes in the electromagnetic field into changes in induced electromotive force, thereby sensing the positions of the main rotor 3 and the secondary rotor 2. The principle of eddy currents is used to detect the positions of the main rotor 3 and the secondary rotor 2 as they move above the main receiving coil 8 and the secondary receiving coil 10.
[0038] The above description is only a preferred embodiment of the present invention and does not limit the implementation method and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.
Claims
1. An inductive sensor, characterized in that: include: Base, cover, auxiliary rotor, main rotor, PCBA board, connector; The PCBA board is installed on the cover plate; The connector is mounted on the PCBA board; The auxiliary rotor is installed inside the base; The main rotor is mounted on the cover plate, and the upper end of the main rotor passes through the PCBA board and engages with the auxiliary rotor; The cover plate is mounted on the base.
2. An inductive sensor according to claim 1, characterized in that: Also includes: Bracket; The auxiliary rotor is installed inside the base through the bracket.
3. The inductive sensor according to claim 1, characterized in that: A circular through hole is provided on the PCBA board, and the main rotor extends into the interior of the base through the circular through hole and engages with the auxiliary rotor.
4. An inductive sensor according to claim 3, characterized in that: Two groups of main receiving coils are provided on the PCBA board, and the periphery of each group of main receiving coils is covered with a circle of first excitation coil.
5. The inductive sensor according to claim 4, characterized in that: The two groups of main receiving coils are symmetrically arranged on both sides of the circular through hole with respect to the center of the circular through hole.
6. The inductive sensor according to claim 1, characterized in that: The PCBA board is provided with an auxiliary receiving coil at a position close to the auxiliary rotor, and the outer periphery of the auxiliary receiving coil is covered with a circle of second excitation coil.
7. The inductive sensor according to claim 1, characterized in that: The meshing part of the main rotor is an annular iron sheet with teeth on the outer wall.
8. The inductive sensor according to claim 1, characterized in that: The meshing part of the auxiliary rotor is composed of a plurality of semicircular iron sheets.